This issue occurs when you use the Hungarian, Polish, Croatian, or Slovenian keyboard layout, and after you copied content to clipboard. When this issue occurs, the "@" character appears together with the clipboard content in a Microsoft Skype for Business or Microsoft Lync 2013 instant message conversation window. This issue occurs because Skype for Business or Lync 2013 cannot differentiate between the CTRL+ALT+V keyboard shortcut and the Alt Gr+V keyboard shortcut.
Resolution
To resolve this issue, install the June 9, 2015 update (KB3054791) for Lync 2013 (Skype for Business).
Note Lync 2013 was upgraded to Skype for Business in April 2015.
